diff --git a/src/model_mod.F90 b/src/model_mod.F90
index 5d28283677c9cf1b2b4614330a0a974bf29bc2eb..c8da9df1eb937e9113a83a0e5e214c93264bb08b 100644
--- a/src/model_mod.F90
+++ b/src/model_mod.F90
@@ -31,7 +31,7 @@ MODULE model
   REAL(dp), PUBLIC, PROTECTED ::     K_E =  0._dp     ! Backg. electric field drive
   REAL(dp), PUBLIC, PROTECTED ::   GradB =  1._dp     ! Magnetic gradient
   REAL(dp), PUBLIC, PROTECTED ::   CurvB =  1._dp     ! Magnetic curvature
-  REAL(dp), PUBLIC, PROTECTED :: lambdaD =  1._dp     ! Debye length
+  REAL(dp), PUBLIC, PROTECTED :: lambdaD =  0._dp     ! Debye length
   REAL(dp), PUBLIC, PROTECTED ::    beta =  0._dp     ! electron plasma Beta (8piNT_e/B0^2)
 
   LOGICAL,  PUBLIC, PROTECTED ::      EM =  .false.   ! Electromagnetic effects flag